Industrial truck



Jan. 8 1924. 1,479,981

C. E. COCHRAN INDUSTRIAL TRUCK Filed July Q, 17920 K 3 Sheets-Sheet lLLEWW,

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Maasai rica.

CLYDE E. COCHRAN, OF CLEVELAND, OHIO, TRIO COMPANY, OF CLEVELAND,

ASSIGNOR TO THE ELWELL-PARKER EDEC- OHIO, A CORPORATION OF OHIO.

INDUSTRIAL TRUCK.

Application led July 9,

To all whom t may concern:

Be it known that I, CLYDE E. CGHRAN, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Industrial Trucks, ofwhich tli'e following is a full, clear, and exact description, referencebeing had to the accompanying drawings.

This invention relates to power-operated trucks such as are commonlyused in factories, warehouses,ffreight stations and the like. Theessential'pbject of this invention is to provide inj'a motor driventruck a power-operated carrying support arranged to facilitate thepicking up or loading of heav packages, boxes, bales, bundles and theike, after the manner of two-wheeled handA trucks, commonly known aschiselwedge hand trucks,A as vwell as being adapted to quickly unloadsuch packages from the support by movement thereofr under control of thepower-operated device.

A further object is to provide'a lload- 2 5 lifting member pivotedadjacent the center of the truck, said load-lifting member beingconnected to a toggle, whereby-it may be operated to swing about thatpivot to ac complish the desired lifting while changing the angle of theload support but slightly. Additional objects are to so construct'thetruck that it may be comparatively simple, efficient and rapid inoperation, and have no parts liable to get out of order. `In thedrawings Fig. 1 is a side elevation of a power-operated truck equippedwith my invention; Fig. 2 is a side elevation showing Ithe mechanism forraising'the load; Fig. 3 is a view similar to Fig. 2, showing the pos1-tion of theparts after the load is lifted; Fig. 4 is a side elevationshowing the load lifting mechanism and the truck driving motor; Fig. 5is a top plan view. of the partsl s hown in Fi 4.

Referring riefly to the general construction of the truck shown, whichis merely illustrative of any suitable truck equipped with my invention,1 and 2 indicate longitudinal frame members supported at their rear endsby wheels 3 and at the front by one or more wheels 4. 3

Arranged on the forward end of the frame members are the operatorscontrols including brake and controller platforms indicatedat 5, and thesteering mechanism is 1920. serial No. 394,932.

shown at 6.` The control for the load lifting .casing 91, The wheels 3may be driven by gear or this motor 9, suitable Worm and otherconnections being provided.

In an arrangement of truck construction siich'as shown, the batterysupply current to a reversible motor indicated at 10. This motor servesto moveja pull rod 14 through a nut threaded onto Ithey screw formed `onthe rod, the nut l,carrying` worm teeth engaged by a worm on thearmature shaft'of the motor. The casing for this nut and worm isindicated at and serves to enclose these parts while also@y acting tosupport the frame` of the motdr. `Extending each Way from the casing 11are tubular bearing members through which 'the pull rod screw memberextends,` `permitting longitudinal movement of thisod as the nut isrotated by the motori,` lThis movement of the pull rod 14 operatesthelifting mechanism and during such `operation the rod swings with thecasing and motor about a pivot, indicated at 13, carried by the supportsof the housing 91. The? arrangement of the driving gearing andnntconnecting the motor with the pull rod is preferably as shown,described and claimed iin my .prior Patent N o. 1,275,849, issued August13, 1918.

Pivoted at 15 adjacent the center of the truck are shown the framemembers 16, having the load carrying arms 17. Extending `upwardly fromthe frame 16 are uprights 18 connected by crosspieces 185.l Struts 19shown as connected to the pivot 15 serve to brace these uprights. 5

'A toggle device comprising pairs of arms 20 and 21 connects the framewith the load lifting members and these arms are pivoted to the frameand loadV lifting members respectively. The pivot 23 for the arms 20 ispreferably carried by abracket 30 secured to the ends of the' framemembers 1 and 2, while the arms 21 are pivoted to a cross rod 24. shown:1s secured at its ends to the uprights 18. Pivoted connection is madebetween the toggle device and the rod 14, by a l shaped .tubular member25 embracing the in# termediate pivot shaft extending through all of thearms 21 and 22.

The casing 91 may be supported by suitable strut members 32 which areshown as

